Saw-gummer



NrTED sTATEs PATENT OFFICE.

M. ERNSBERGER, OF BREMAN, OHIO.

SAW-GUMMER.

Specification of Letters Patent No. 19,835, dated April 6, 1858.

To all whom 'it may concern:

Be it known that I, M. ERNSBERGER, of Breman, in the county of Fairfieldand State of Ohio, have invented a new and Improved Implement or Devicefor Gumming Saws; and I do hereby declare that the following is a full,clear, and exact description of the same, reference being had to theannexed drawings, making a part of this specification, in which- Figurel is a longitudinal section of my improvement taken in the line (zo),(oo), Fig. 2. Fig. 2, is also a vertical section of do. taken in theline (y), (y), Fig. l.

Similar letters of reference indicate corresponding p-arts in the twoiigures.

This invention consists in the employment or use of a stock providedwith set screws for clamping it to the saw, in connection with a burcutter peculiarly constructed and applied to the stock in such a waythat the same may be properly guided or held in proper position while inoperation and also fed to its work with the greatest facility the wholeforming a simple and eiicient implement, well adapted and moreespecially1 designed for gumming circular saws.

To enable those skilled in the art to make and use my invention I willproceed to describe its construction and operation.

A, represents the stock, which may be constructed of two metal bars (a),(o), divaricated at one end andv connected together at the opposite endby a bolt (o). The bar (a) has three screws (d) passing through it, onethrough each prong of its divaricated end and the other at or near .theangle of the prongs. See Fig. 2.

From the outer side of the bar (a) a tube B, projects at right angles,the external surface of this tube is provided with a screw thread and acollar C, is itted on the tube, said collar being provided with aninternal screw thread. D is a shaft or arbor, the outer end of which issecured within the collar C, and passes through the end of the collarand has a square made on it to receive a crank E. The shaft or arbor isallowed to turn freely within the collar C, and it is sui'iiciently longto pass entirely through the tube B, and bar (a).

The inner end of the shaft or arbor D, has a cutter orbur (e) formed onit. This cutter is made by forming ratchet shaped projections on the endof the shaftso that or arbor has a longitudinal central opening c orhole made in it to receive the pin (g) which serves the double functionof a guide -to the shaft D, and guide for the adjustment of the cutterto the teeth as hereinafter described.

To the outer end of the collar C, a hand wheel F, is attached.

The operation is as follows: The stock A, is placed on the saw, the sawlitting in a space (7L) allowed between the bars (a), (o), the stockbeing secured to the saw by the screws (d) and in suoli position thatthe pin (g) will t at the bottom of a space between two teeth of thesaw, the stock being in a vertical position, see Fig. 2, in which thesaw, a circular one, is shown in red. When the stock A, is thus adjustedto ythe saw, the collar C, is turned by hand in the proper direction topress the cutter (e) rmly against the saw, and the shaft or arbor D, isthen turned by hand so that the cutter (e) will cut out a portion of thespace between the two teeth, when the pin (g) is placed the portion outout being of course equal to the difference between the diameter of thepin (g) and that of thevcutter (e). When a portion is cut out betweenthe teeth and the space between them depressed, the screws (d) arerelaxed and the saw slightly turned so that the pin (g), will fit in theadjoining space, the operation being repeated until the saw is gummedall around,

the cutter (e) being fed toward its workasoccasion requires.

It will be seen that the pin (g) serves asa guide for the adjustment ofthe implement to the saw, for said pin is always fitted at the bottom ofthe space to bedepressed or cut out and the pin also guides the shaft orarbor D, insuring'the perfect operation of the cutter.

This implement is exceedingly simple and eiicient. It may be constructedat a trifling cost and readily kept in working order, and applied tocircular saws without removing them from their shafts or arbors.

I do not claim separately the bur or cutter (e) for that has been'previously used for analogous purposes; but

Having thus described my inventon,what Whole being` combined andarranged sub- I claim as new and desire to secure by Letstantially asand for the purpose set forth.

ters Patent, is-

'The stock A, provided with the screws M' ERNSBERGER' 5 (d) or theirequivalents and also provided Witnesses: with the tube B, collar C, pin(g) and the SAM: BRISBIN, shaft D, With cutter (e) formed on it, the E.S. GARDNER.

